\NewDocumentCommand{\tangentcount}{ m }
{
	\ellett_tangentcount:n { #1 }
}
\cs_new:Npn \ellett_tangentcount:n #1
{
	\int_case:nnn { #1 }
	{
		{ 1 } { exactly ~ one }
		{ 2 } { exactly ~ two }
	}
	{ no }
}
